void RenderManShader::loadShader( const std::string &shaderName, bool keepExistingValues )
{
IECore::ConstShaderPtr shader = runTimeCast<const IECore::Shader>( shaderLoader()->read( shaderName + ".sdl" ) );
loadShaderParameters( shader.get(), parametersPlug(), keepExistingValues );
namePlug()->setValue( shaderName );
string type = "ri:" + shader->getType();
bool oldAndNewTypesCompatible = false;
if( type == "ri:volume" )
{
// "ri:volume" is the type of the shader, but it's not a valid assignment
// type. Valid assignment types are "ri:atmosphere", "ri:interior" and "ri:exterior".
type = "ri:atmosphere";
const string oldType = typePlug()->getValue();
oldAndNewTypesCompatible = oldType == "ri:atmosphere" || oldType == "ri:interior" || oldType == "ri:exterior";
}
if( !keepExistingValues || !oldAndNewTypesCompatible )
{
typePlug()->setValue( type );
}
}
void RenderManLight::loadShader( const std::string &shaderName )
{
IECore::ConstShaderPtr shader = IECore::runTimeCast<const IECore::Shader>( RenderManShader::shaderLoader()->read( shaderName + ".sdl" ) );
RenderManShader::loadShaderParameters( shader.get(), parametersPlug() );
getChild<StringPlug>( "__shaderName" )->setValue( shaderName );
}